Brake.



- No. 762,302. PATENTED JUNE 14, 1904.

F. L. GERSTNBR. BRAKE.

APPLICATION FILED MAR. 22. 1904.

NO MODEL. 2 SHEETS-SHEET 1.

Afforney (J PATENTED JUNE 14, 1904. F. L. GERSTNER.

BRAKE.

APPLICATION FILED MAR. 22. 1904.

2 SHEETS-SHEET 2.

N0 MODEL.

(Q, ftomqyd plained.

. ments in Brakes, of which the following is a Patented June 14,1904.'

PATENT OFFICE.

FRANK L. GERSTNER, OF CRAIG, NEIV YORK.

BRAKE.

SPECIFICATION forming part of Letters Patent N0. 762,302, dated J line 14, 1904.

Application filed March 22, 190 i. 7

To all whovn it vncty concern:

Be it known that I, FRANK L. GERsTNER,a citizen of the United States, residing at Craig, in the county of Schenectady and State of New York, have invented new and useful Improvespecification.

This invention is a brake particularly suitable for railway use and embodies, in connection with a wheel having an innerfriction-rim, a sleeve on the axle connected to the brakerod and carrying cams which press the brakeshoes against said rim on the wheel to effect the braking action.

The object of the invention is to produce an improved device of the kind, the advantages of which will be more fully hereinafter ex- In the accompanying drawings,,Figure 1 is an inside elevation of a car-wheel with the brake applied thereto. Fig. 2 is a central vertical section thereof. Fig. 3 isan inner view in elevation, showing the parts which fit within the riin. -Figs. 4., 5, 6, 7, 8, 9, 10, and 11 are perspective views showing the several parts of the structure separated from each other and indicating the manner in which they are put together.

Referring specifically to the drawings, 6 indicates the car-wheel, having on the inner side thereof an annular rim 7, within which fits a friction-ring 8, having tenons 9, which fit in mortises 10 on the rim to prevent relative circular movement. The inwardly-projecting hub 6*,of the wheel receives a set of antifriction-roller 11, carried between split rings 12, and these rollers form an antifriction-bearing between the hub and the sleeve 13, which is bored to proper size to fit over theaxle and said hub. This sleeve has on the inner end and outer side thereof diametrically opposite cams 14:, which are faced with antifriction-rollers 15--to insure an easy action, the rollers being let into the face of the cam. On its outer end the sleeve has an arm 16, which is connected to the brake-rod 17 Upon the sleeve 13 is mounted a sleeve 18, which has an outwardly-extending annular flange 19, which when the parts are assembled fits fairly within the rim 7 close enough to semi No. 199,454.. (No model.)

assist in keeping out dirt and the like. Projecting inwardly from the flange-19am blocks 20, which have a curve concentric with the axis of the axle and which act as supports or pivot-pieces for the brake-shoes, (indicated at 22.) The blocks 20 are located in diametrically opposite positions, and the length of each is about a quarter-circle. Each block has an undercut notch 21, within which fits an ofiset tongue 23 on the end of the brake-shoe. This produces a loose or pivotal connection which permits the brake-shoes to be swung out into contact with the friction-ring 8, the face of I the brake-shoes being contiguous to such ring when the parts are assembled. The free end of the brake-shoes has an inner cam-face 24, against which the rollers of the cams 14 contact. Said cams 14 project radially between the ends of the blocks 20, and the motion of the sleeve 13 and the cams carried thereby is stopped and limited by contact of the ends of the cams against said blocks.

The parts when assembled are held in position by a nut or collar 25, which is clamped upon the axle outside the sleeve 13, and this nut or collar fits partly within the sleeve 13 and has a set of antifriction-rollers 26 carried by rings 27, which run between the nut and the sleeve in a race 28, produced by a counterbore in the end of the sleeve. The nut turns with the axle, and it will be seen that the sleeve 13 has the antifriction-bearings 11 and 26 at each end, upon which it is supported, so that friction is reduced to a minimum and ease of operation assured. The sleeve 18 is held in place and prevented from turning by brackets 29, which project from the bolster of the car-truck and are bolted to the sleeve. Both of these sleeves 13 and 18, as well as the rings 12 and 27 and the nut or collar 25, are split lengthwise, so that they may be assembled upon the axle after the wheels are in place. The friction ring 8 is preferably formed in one piece and split on one side and set into the wheel-rim before the wheel is put on the axle.

In operation the rod 17 is connected to the brake-rod of an air or other brake, and normally the,shoes rest out of contact with the wheel-rim. When the brakes are to be applied, the pull on the rodl'T turns the sleeve 13 in its hearings on the axle, causing the cams to swing the brake shoes outwardly against the friction-ring 8, thereby causing the braking friction. The cam action is very powerful, and an effective and quick acting brake is produced, particularly suitable for railway purposes, but also applicable, with slight modifications, to use upon wheeled vehicles of many kinds. The brake-shoes or friction-ring may be renewed by loosening the collar 25 and slipping the parts down the axle,which removes the sleeves from the wheel and exposes the brake-shoes, which can then be lifted out and renewed. The tongue and undercut groove connection permits the brakeshoes to be taken off the sleeve without taking out any bolts.

What I claim as new, and desire to secure by Letters Patent, is

1. In a brake, the combination with a wheel having a projectingrim, of a sleeve which may be turned, on the wheel hub and axle, having cams thereon, and a stationary sleeve extending over said sleeve, and having swinging brake-shoes carried thereby, between the rim of the wheel and the cams.

2. In a brake, the combination with a wheel having a projecting rim with a friction-surface onthe inner side thereof, of a circumferentially-movable inner sleeve supported in hearings on the wheel hub and axle, and having peripheral cams,and a stationary outer sleeve having swinging brake shoes carried thereby, between the cams and the said friction-surface.

the wheel-axle, having, respeetively,cams and brake shoes, the shoes being between the cams and the rim, one sleeve being stationary and connected to a fixed part of the car or vehicle and the other being circumfcrentially movable and connected to the brake-rod.

4:- The combination with a wheel and axle, of inner and outer sleeves on the axle, the former being relatively movable, circumferentially, and having cams thereon and a connection to the brake-rod, and the latter being relatively stationary and connected to a fixed part of the vehicle,and having swinging brakeshoes located between the cams and the wheel, and a nut or collar on the axle, holding the sleeves to the wheel, and removable to permit the sleeves to move axially along the axle, away from the Wheel.

5. The combination with the wheel and axle, the wheel having a projecting rim with an inwardly-presented friction-face, of a removable collar on the axle, a movable sleeve carried onthe collar and wheel in bearings therebetween, and havingspaced projecting cams on the outer side,and a connection to the brakerod, a stationary sleeve extending around the movable sleeve and having spaced blocks projecting between the cams, and brake-shoes loosely connected at one end to said blocks and extending circumferentially with their other ends between the cams and the wheel-rim.

In testimony whereof I have signed my name to this specification in the presence of two sub scribing Witnesses.

FRANK L. GERSTNER.

Witnesses:

S. L. TUTTLE, MCGLELLAN BLAIR. 

